function Person(name, age) {
    this.name = name;
    this.age = age;
}
Person.prototype.title = '我好想哟啊-_-'
Person.prototype.sayHello = function() {}
let p1 = new Person('John', 25);
console.log(p1.name); // John
console.log(p1.title); // 25

export default Person;